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Diodes Incorporated BS170PSTOB
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- Part No.:
- BS170PSTOB
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- E-Line-3
- Datasheet:
-
BS170PSTOB.pdf
- Description:
- MOSFET N-CH 60V 270MA E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:2,918
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Product details
Overview
BS170PSTOB from Diodes Incorporated is an N-channel enhancement-mode vertical DMOS FET rated for 60 V VDS, 270 mA continuous drain current, and 5 Ω RDS(on) at VGS = 10 V; used as a low-side switching device in low-power DC-DC converters, LED drivers, and signal routing circuits.
For engineers reviewing the BS170PSTOB datasheet, BS170PSTOB pinout, BS170PSTOB application, or BS170PSTOB equivalent, key selection criteria include verified RDS(on) at 10 V gate drive, 60 V breakdown margin for 24 V rail systems, pulsed current capability up to 3 A, and TO-92-compatible leadform for through-hole prototyping and legacy board replacement.
Technical Context
This discrete MOSFET operates in enhancement mode with a gate-threshold voltage range of 0.8–3 V, enabling direct interface with 3.3 V and 5 V logic controllers. Its vertical DMOS structure delivers stable transconductance (gfs = 200 mS) and low input capacitance (Ciss = 60 pF), supporting fast switching at ≤10 ns turn-on/turn-off times under defined test conditions.
The device is characterized for operation across –55 °C to +150 °C junction temperature, with 625 mW power dissipation at 25 °C ambient. Drain-source leakage (IDSS) is specified at ≤0.5 µA at 25 V, and gate leakage (IGSS) remains ≤10 nA at 15 V, ensuring low standby power in battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 60 V - Withstands transient overvoltage up to 60 V without breakdown; suitable for 24 V nominal systems with safety margin. |
| RDS(on) | 5 Ω @ VGS = 10 V, ID = 200 mA - Confirmed on-resistance enables <1 V drop at 200 mA, minimizing conduction loss in low-current switches. |
| ID (continuous) | 270 mA @ Tamb = 25 °C - Maximum steady-state current under free-air conditions; derates above 25 °C per thermal resistance. |
| ton/toff | 10 ns each - Measured with 50 Ω source impedance and <5 ns rise time; supports >10 MHz switching in optimized layouts. |
| Ciss | 60 pF @ VGS = 0 V, VDS = 10 V - Low input capacitance reduces gate drive power and improves high-frequency response. |
| VGS(th) | 0.8–3 V @ ID = 1 mA - Threshold range ensures reliable turn-on with standard 3.3 V/5 V microcontroller GPIOs. |
Pinout & Package
BS170PSTOB uses a TO-92-compatible through-hole package with E-Line pin configuration (Drain–Gate–Source, left-to-right when viewing flat side with leads down). The package supports manual soldering, socketing, and legacy PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (left) | Drain (D) | Main current-carrying terminal; connected to higher-potential node (e.g., load supply rail). |
| Lead 2 (center) | Gate (G) | Control terminal; requires low-impedance drive to achieve full enhancement and minimize switching losses. |
| Lead 3 (right) | Source (S) | Reference terminal for gate drive; tied to system ground or low-side return path in common-source configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Vertical DMOS construction | Enables consistent RDS(on) and gfs across temperature, improving thermal stability in compact layouts. |
| Low Ciss (60 pF) | Reduces required gate charge and driver power, easing integration with low-drive-strength MCUs and logic gates. |
| Fast switching (10 ns ton/toff) | Supports high-frequency PWM control in LED dimming and DC-DC pre-regulators without excessive switching loss. |
| TO-92 compatibility | Direct replacement for legacy N-channel FETs in existing through-hole designs; no footprint redesign needed. |
Applications
| LED Dimming Control | Low-Voltage Logic-Level Switching |
|---|---|
Use Scenario: Pulse-width modulated current control of indicator LEDs in industrial HMIs and portable instrumentation. IC Role / Device Role / Timing Role: Low-side switch driven by MCU GPIO; handles 200 mA peak LED current with minimal voltage drop. Use Value: 5 Ω RDS(on) limits forward voltage loss to ≤1 V at 200 mA, preserving brightness headroom in 3.3 V/5 V systems. | Use Scenario: Enabling/disabling peripheral modules (e.g., sensors, UART transceivers) via microcontroller output pins. IC Role / Device Role / Timing Role: Signal-level power gate; isolates downstream circuitry during sleep or fault states. Use Value: 0.8–3 V VGS(th) ensures clean turn-on with 3.3 V logic, while 10 nS switching prevents glitch-induced resets. |
| DC-DC Converter Pre-regulator | Relay Driver Interface |
Use Scenario: High-side or low-side switch in non-synchronous buck pre-regulators for 12 V → 5 V conversion in embedded power supplies. IC Role / Device Role / Timing Role: Power switch operating at 100–500 kHz; duty-cycle controlled by external PWM generator. Use Value: 60 V VDS rating accommodates input transients up to 60 V, and 625 mW Ptot supports continuous operation at 270 mA with adequate heatsinking. | Use Scenario: Driving 5 V/12 V electromagnetic relay coils in PLC I/O modules and building automation panels. IC Role / Device Role / Timing Role: Inductive load switch; absorbs flyback energy via external diode or internal body diode. Use Value: 3 A pulsed drain current (IDM) safely handles relay coil inrush (typically 1–2 A), and 150 °C max Tj sustains reliability in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel low-voltage switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZVN3306A | RDS(on) = 3.5 Ω @ VGS = 10 V; higher gfs (300 mS); same TO-92 package. | Better conduction efficiency at 200–300 mA; slightly higher gate charge (Qg not specified but implied by gfs). | Select ZVN3306A when lower on-resistance is critical and gate drive strength permits. |
| 2N7002 | RDS(on) = 5.5 Ω @ VGS = 4.5 V; SOT-23 surface-mount; VDS = 60 V; ID = 300 mA. | Requires PCB rework for SMT assembly; better suited for space-constrained automated production. | Choose 2N7002 for new SMT designs where footprint size and assembly cost outweigh through-hole serviceability. |
Compared with ZVN3306A and 2N7002, BS170PSTOB offers proven TO-92 mechanical compatibility and balanced RDS(on)/switching speed for hand-soldered prototypes and field-replaceable modules, while maintaining identical 60 V/270 mA ratings.
Availability
BS170PSTOB is available at Aetrix Electronics and suitable for LED dimming control, low-voltage logic-level switching, and relay driver interfaces requiring stable component supply across industrial, instrumentation, and embedded design cycles.
Supply support for BS170PSTOB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, cost-optimized components for industrial, computing, and consumer markets.
The BS170PSTOB belongs to Diodes' general-purpose N-channel MOSFET product line, designed specifically for low-power switching in through-hole-based legacy and prototyping applications.
FAQ
Is BS170PSTOB pin-compatible with the original BS170?
Yes. BS170PSTOB maintains identical TO-92 pinout (D-G-S, left-to-right), electrical specifications (60 V VDS, 5 Ω RDS(on), 270 mA ID), and thermal ratings as the legacy BS170, enabling drop-in replacement without layout changes.
What is the maximum safe gate drive voltage for BS170PSTOB?
The absolute maximum gate-source voltage is ±20 V. For reliable long-term operation, gate drive should be limited to 10–15 V, as RDS(on) is fully specified at 10 V and higher voltages provide diminishing conduction improvement while increasing risk of gate oxide stress.
Can BS170PSTOB be used in linear (analog) amplifier configurations?
No. BS170PSTOB is characterized and qualified only for switching operation. Its transconductance and thermal behavior are not guaranteed in linear mode, and sustained operation in the ohmic region risks thermal runaway due to lack of SOA curves in the datasheet.
Does BS170PSTOB include integrated ESD protection on the gate?
No. The device has no built-in gate protection diodes. External 10 kΩ series gate resistor and optional 15 V Zener clamp between gate and source are recommended to prevent ESD damage during handling and PCB assembly.
BS170PSTOB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 60 V
- Current - Continuous Drain (Id) @ 25°C:
- 270mA (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 5Ohm @ 200mA, 10V
- Vgs(th) (Max) @ Id:
- 3V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 60 pF @ 10 V
- FET Feature:
- -
- Power Dissipation (Max):
- 625mW (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
BS170PSTOB FAQ
1.How can I place an order for BS170PSTOB through Aetrix?
Please submit a Request for Quotation (RFQ) for BS170PSTOB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BS170PSTOB reliable?
The price and inventory of BS170PSTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BS170PSTOB is usually 5 days.
3.What payment methods are accepted for BS170PSTOB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BS170PSTOB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BS170PSTOB?
BS170PSTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BS170PSTOB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BS170PSTOB?
For technical support, including BS170PSTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BS170PSTOB requirements.
6.How does Aetrix verify that BS170PSTOB is sourced from the original manufacturer or authorized distributors?
All BS170PSTOB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BS170PSTOB meets industry standards.
7.What is the process for return or replacement of BS170PSTOB?
All BS170PSTOB units undergo pre-shipment inspection (PSI). If there is an issue with BS170PSTOB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BS170PSTOB part is unused and in its original packaging.
Return procedure for BS170PSTOB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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